JP2864307B2 - Facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus containing an answering machine as an external telephone.

[0002]

2. Description of the Related Art This type of conventional facsimile apparatus has a configuration as shown in FIG. 2. When an incoming call arrives at lines L1 and L2, the incoming call reaches answering machine 1 via relay contact RY4. The answering machine 1 automatically answers the incoming call. In this case, the answering machine 1 sends a response message to the line side via the loop detection circuit 2 and the relay contact RY4. If the calling side is a facsimile machine, the calling side indicates that it is a non-voice terminal 1100.
CNG signal H _Z arrives. On the other hand, a CPU (not shown) for controlling the facsimile apparatus recognizes the incoming call response of the answering machine 1 by the loop detecting circuit 2, and
The NG signal, the relay contact RY3, transformer T2, upon receiving via the switch SW and the modem 9, 2100H _Z
After the CED signal (called station identification signal) is returned, predetermined protocol processing is performed, and thereafter, an image signal from the calling side is received.

[0003]

However, when a response message is sent from answering machine 1 to lines L1 and L2,
The response message is relay contact RY3, transformer T
2, also reach the modem 9 via the switch SW, the line L
The CNG signal cannot be detected because it overlaps with the CNG signal transmitted from the L1 side to the modem 9. FIG. 3 is a diagram showing the state of overlap between the CNG signal and the answering message of the answering machine. As shown in FIG. 3C, the detection result of the CNG signal by the modem 9 erroneously detects the 1100 Hz _Z component in the message. (), Or a crack () is generated in the detection waveform of the CNG signal, and as a result, the CNG signal cannot be detected accurately.

[0004]

In order to solve such a problem, the present invention provides a method of connecting to a line via a line transformer.
First hybrid for transmitting a CNG signal to a modem
Circuit and an extension transformer that supplies power to the answering machine
And a second hybrid circuit connected between the first hybrid circuit, Kai based on call response answering machine
Line and the voice message signal from the answering machine
Via the second hybrid circuit and the first hybrid circuit
And output to the line.
The hybrid circuit routes voice message signals to the modem.
This is intended to suppress intrusion .

[0005]

[Action] incoming to the line is reached, when the answering machine has automatic response, together with the loop of the line is re閉結by the operation of the contact points (PC1, RL1), the extension transformer by the operation of contact points (RL2) Power is supplied to the answering machine via the telephone. Then, the CNG signal coming from the line is sent to the modem. At this time, even if a voice message is output from the answering machine, the voice message
Sneaking into dem is suppressed by the first hybrid circuit
As a result, the CNG signal can be sent to the modem without being affected by the voice message.

[0006]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a facsimile apparatus according to the present invention. In the figure, 1 is an answering machine having an answering machine function, 2 is an answering machine 1 having a line L
1, a loop detection circuit for detecting that L2 has been captured, 3
Is an incoming call detection circuit for detecting incoming signals arriving at the lines L1 and L2, 4 is a line transformer, 5 is an extension transformer,
Reference numeral 7 denotes a hybrid circuit that performs two-wire / four-wire conversion, 8 denotes a silence detection circuit that detects a silence state, 9 denotes a modem that transmits and receives a facsimile signal, and 10 denotes a CPU. Reference numeral 11 denotes a reading sensor for reading information of a document; 12, a recording head for recording a received image signal on recording paper; 13, a key unit;
1, RL1 and RL2 are relay contacts, SW1 to SW4 are switches, and HS is a telephone handset built in the main body.

[0007] Such a facsimile apparatus accommodating the answering machine 1 is provided with each relay contact P when in a standby state.
C1, RL1, and RL2 are in a state shown by a dotted line. When an incoming signal arrives at the lines L1 and L2, the incoming signal is detected by the
Transmitted to PU10 and relay contacts RL1, RL
2 _1, RL2 ₂ and the answering machine 1 via the loop detection circuit 2 is transmitted. Answering machine 1 automatically responds to this call when it detects the ringing of the fixed number of incoming you arrived.
The response of the answering machine 1 is transmitted through the loop detection circuit 2 to C
In this case, the CPU 10 drives each relay and controls its contact to a state shown by a solid line, and
The loops of L1 and L2 are closed again. At this time, the line L
The loops 1 and 2 are closed by the line transformer 4,
A direct current is supplied to the answering machine 1 via the extension transformer 5.

When the lines L1 and L2 are thus closed,
If the calling party is a facsimile apparatus, CNG signal 1100h _Z indicating that the calling party is a non-voice terminal arrives to the line L1, L2. The CNG signal, relay contact PC1, RL1, line transformer 4, the hybrid circuit 6, the modem 9 through the switch SW1 ₁ and SW2
To the receiving terminal RX1. As a result, the CPU 10
If it is determined that the CNG signal arriving at the modem 9 is valid, the process shifts to a facsimile signal receiving state.

At this time, a response message from the answering machine 1 includes relay contacts RL2 ₁ and RL2 ₂ , extension transformer 5, hybrid circuit 7, switches SW3 and SW1.
₂ , the hybrid circuit 6, the line transformer 4, and the relay contacts PC1, RL1, and are sent to the lines L1, L2. In this case, if the side tone balance of the hybrid circuit 6 is good, the wraparound of the response message to the receiving terminal RX1 of the modem 9 is suppressed (attenuation of about 20 dB), and the influence of the response message on the CNG signal detection is reduced. It can be greatly reduced. As described above, the influence of the response message on the CNG signal is eliminated by separating the CNG signal and the response message by the hybrid circuits 6, 7, and the like.

If the originating side is not a facsimile machine but a normal telephone, after the answering message of the answering machine 1 is transmitted, a message recording message from this telephone arrives on the lines L1 and L2. The voice message, relay contact PC1, RL1, line transformer 4, the hybrid circuit 6, the switch SW1 _1, SW4,
Hybrid circuit 7, extension transformer 5, relay contact RL
2 _1, is recorded on the answering machine 1 through RL2 _2.
In this case, the hybrid circuit 7 prevents a voice message recorded on the answering machine 1 from the calling side from returning to the calling side.

In this way, the response message sent from the answering machine 1 at the time of answering the incoming call is prevented from wrapping around to the modem 9, so that the CNG signal can be properly received. In the case sidetone balance of the hybrid circuit 6 is not as good, the central frequency between the switch SW3 and the switch SW1 ₂ and is by providing the BEF (notch filter) of 1100h _Z, more accurately detect the CNG signal be able to.

[0012]

As described above, according to the present invention, when an incoming call arrives at the line and the answering machine automatically answers,
The line loop is closed by the operation of PC1 and RL1 , and the power is supplied to the answering machine via the extension transformer by the operation of the contact RL2 . And then, CNG signal incoming to the line are sent to the modem, the voice message even this time the telephone answering machine or rales voice message is output
Page is the first hybrid circuit
(Hybrid circuit 6). As a result,
The CNG signal is sent to the modem without being affected by the voice message , so that the CNG signal can be properly received.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a facsimile apparatus according to the present invention.

FIG. 2 is a block diagram showing a main part of a conventional facsimile machine.

FIG. 3 is a signal waveform diagram of each part of a conventional facsimile apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Answering machine 2 Loop detection circuit 3 Incoming call detection circuit 4 Line transformer 5 Extension transformer 6, 7 Hybrid circuit 9 Modem 10 CPU PC1, RL1, RL2 Relay contact SW1-SW4 Switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04N 1/00 107 H04N 1/32

Claims (1)

(57) [Claims] 1. A non-voice terminal that accommodates an answering machine that automatically responds to an incoming call on a line and sends a voice message signal and that arrives on the line when the incoming call is answered.
In a facsimile apparatus having a modem for receiving an NG signal, a CNG connected to the line via a line transformer
A first hybrid circuit for sending a signal to the modem
An extension transformer for supplying power to the answering machine; and
And a second hybrid circuit connected between the first hybrid circuit, based on the call response of the answering machine
Voice message from the answering machine
Signal from the second hybrid circuit and the first
Control to output to the line via the hybrid circuit
And the first hybrid circuit is configured to
A facsimile apparatus wherein a sneak signal is prevented from sneaking into a modem .